A former athletic director said he heard of things Knutson was doing with students’ phones and told him to stop texting students and to stop looking at their phones.

“I told him he's putting himself in a position he doesn't want to be in,” he said in court.

The former administrator said a short time after he first approached Knutson, a student came to him claiming Knutson went through her phone and made sexual comments about her pictures. The girl said Knutson wrote messages on sticky notes saying, “A picture will get you a B.”

The administrator testified the school principal searched Knutson’s recycling bin and found a number of sticky notes.

Prosecutors said one note read, “Last night was awesome. Are you mad?”

The defense said there was no way to prove Knutson wrote the notes and tried to debunk an alleged victims' testimony, calling on an OPS human resource administrator.

The human resource administrator testified school policy was to investigate internally before deciding whether or not to call police. He said the school district would not have contacted police in one of the four cases, citing questions of credibility and inconsistency in the girl's complaint.

The district’s policy has changed since then. Now, anytime a student issues a complaint against a teacher, child protective serves or Omaha police are notified immediately – as opposed to having the district investigate first.

One of Knutson’s four alleged victims is expected to take the stand Tuesday. Prosecutors said there were 25,000 text messages between the two.